Ito, Chihiro published the artcileTwo flavanones from Citrus species, Category: tetrahydropyran, the publication is Phytochemistry (1989), 28(12), 3562-4, database is CAplus.
The new flavanones, hiravanone (I) and yukovanol (II) were isolated from root extracts of some Citrus species and their structures were determined by spectrometric and synthetic methods.
Phytochemistry published new progress about 69097-99-0. 69097-99-0 belongs to tetrahydropyran, auxiliary class Other Aliphatic Heterocyclic,Benzene,Phenol,Ether,Inhibitor, name is 5,7-Dihydroxy-2-(3-hydroxy-4-methoxyphenyl)chroman-4-one, and the molecular formula is C16H14O6, Category: tetrahydropyran.
Referemce:
https://en.wikipedia.org/wiki/Tetrahydropyran,
Tetrahydropyran – an overview | ScienceDirect Topics